Printing press



Mar. 20, 1923.. 1,449,214.

P. F. COX.

PRINTING PRESS.

FILED APR, 16. 921. 2 SHEETS-SHEETJ'.

Mar. 20, 1923.;

P. F. cox.

PRINTING PRESS.

2 SHEETS-SHEET 2.

FILED APR, 16 1921.

ill

Elli, i923.

. r yon ll t all; iftl ll PAUL F. COX, OF CHICAGO, ILLINOIS.

?RI1\TTING PRESS.

Application filed April 16, 1921.

and exact description thereof, reference bein had to the accompanying drawings, which form art of this specification.

This inve; tion is an improvement in flat bed web perfecting printing presses in which the impression cylinders are reciprocated over beds carrying flat forms of type or flat printing SilII1CS.

The objects of the present invention are to increase the capacity of such press so that for each stroke of the impression cylina plurality of papers will be printed 1e web; to provide ample time for shiftthe web while the impression cylinare off impression at the ends of the so that tlie web can be shifted without using; it when the press operated at hi h speed; to provide improved means whereby the web may be continuously fed 1 the press and continuously delivered t erefrom, and the portion of the web innediate the feed and delivery be intermittently shifted forward through the press: to provide novel means for slacking the intermediate portion of the web between the feed and delivery while the web is being shifted over the beds by the looping devices, and for properly tensioning this intermediina' the printing operation; to provide novel means for inking the forms on the press on both the forward and backward strokes of the cylinders and intermediate the successive in'ipressions by the cylinders in each pair so that the forms will be inked on both the harhward and forward strokes of the cylinders and also inked intermediate the impressions produced by the adjacent or twin impression cylinders which operate on each bed.

In the accompanying drawings 1 have illustrated one practical printing press embodying the invention and will explain the invention with reference thereto, and then set forth in the claims the essentials of the in ention and the novel features of construction and novel combinations of parts for all of which protection is desired.

portion of the web ust prior to and dur-.

Serial No. 461,905.

In said drawings;

Fig. 1 is a side elevation of the complete press.

Fig. 2 is a longitudinal vertical section thereof.

As shown in the drawings the press has two beds 1 and 1 arranged parallel and preferably one above the other, and mounted in suitable side frames to support the same. Cooperating with the bed 1 is' a pair of impression cylinders 2, 2*, and cooperating with the bed I is a pair of impression cylinders 2, 2. These cylinders are all mounted or ournaled in suitable bearings in cross heads 8 which cross heads are mounted to slide in guides in the side frames of the press in the well known manner. These cross heads may he reciprocated longitudinally of the press by any suitable means so to move the pairs of cylinders back and forth over their respective beds. I preferably employ pitmans 3 connected to crank gear wheels 41: mounted on a shaft P jouraled in the side frames of the press.

The web W to be printed is led from a roll W to and over an infeed roll 5, which may be provided with coacting tapes 5. The web is then led over a looping roller 6, mounted in one end of rocking levers 6. The web then passes over a guide roller 8 mounted on the cross heads 3 below the upper bed 1; then under the cylinder 2 up over roller 7 movably mounted on the cross heads, as hereinafter referred to, above and between the cylinders a and 2; then down under cylinder 2 and up over a roller 3 mounted on the cross head; then out between beds 1 and 1*" to and over a guide roller 10, mounted on the end of the press frame 10; then up over a guide roller 10 mounted on the end of the frame then back to and over a guide roller 3 mounted on the cross heads above the upper bed 1; then down under the cylinder 2*; then up over a guide roller 53 mounted on the cross heads;

then down under the cylinder 2; then up over a guide 8 mounted on the cross heads; then to and over a looping roller 6 mounted. on the other end of the levers 6; and then .to a delivery or outfeed roll 8 mounted on is first properly led to each cylinder 2, 2"" to be presented thereby to the forms on the bed 1; and is then led to the cylinders 2 and 2 to be presented thereby to the forms on the bed 1.

The levers 6 are journaled on studs or shaft 6 mounted on the side frame 10 of he press. and these levers may be oscillated by means of a link 6 one end of which is gwir ted to a lever 6 and its other end to the larger arm 6 of a bell-crank lever pivoted at 6" on the frame 10 and the shorter arm 6 of this lever carries a roller engaging a cam 9 mounted on a stud or shaft 9 supported on the main frame. In the example shown the roller on arm 6 is held in contact with the periphery of cam 9 by means of a spring 6 as indicated. in the drawings, this spring operating the lever 6 during the taking of mpressions on the web. Any suitable cam may be used in place of cam 9 for the purpo e described.

The crank gears 4C mesh with gears 5 on the infeed roll 5 (Fig 1) and directly drive the latter at the proper speed. The outfeed roll 8 s similarly driven by a gear 8 directly meshing" with the crank gear 4.

The cam shaft 9 is driven by a gear 9" iresh'ng with a gear on the shaft 4 The crank gears may be driven by pinions 11 on a drive shaft 11 journaled in the frame, pinions 11 meshing with the gears 4: as shown. The shaft 11 may be driven directly or indirectly by a motor of any suitable kind (not shown).

in the press shown, the two cylinders operate on each bed on each stroke of the cross heads, and two impressions will be made wh ch is carried in suitable guides attached to the cross heads, and this roller 12 performs the function of both diaributor and form roller and will be hereinafter explained. Between the cylinders 2 and 2 I provide a similar roller 12 which is also carried by the cross heads like the roller 12. ll preferably also provide a distributing roller 12 coacting with the roller 12", and a likedistributing roller 12 coacting with the roller 12.

At. each side of the bed 1 I provide ink distributing plates 13 and 13 and at each side of the bed 1 1 provide similar ink distributing plates 13 and 13. The ink is; supplied to the plate 13 from a fountain 14 mounted on the main frame 10 adjacent the outer end of the plate 13. Ink is taken from the fountain 14: by a ductor roller 15 carried on the cross heads; and ink is transferred.

from the roller 15 through a series of distributing rollers 15 carried on the cross heads to a form roller 15 adjacent the cylinder 2*. The rollers 12 and 15 act as distributing rollers on the plates 13 and also as transfer rollers for transferring ink from the table 13 to the table 13. A form roller and distributor 1! is provided on the cross heads adjacent the cylinder 2; and a like roller 15 adjacent the cylinder The rollers 15 and 12 act as distributing rollers on plate 13, and also as form rollers.

The inking plate 13 is suitably provided with ink from afountain 1 1 mounted on the end of the press, from which fountain the ink is taken by a ductor roller 15 mount ed on the cross heads, and transferred from the ductor rollers 15 through distributing rollers 15 to a form roller 15. ink is transferred from plate 13 to plate 13 by roller 12.

I am able to dispense with two fountains by using the ink plates at opposite ends of each bed. The surfaces of the plates are set slightly below the type surface so that the web around the lower periphery of the cylinder will not contact with the ink plates as the cylinders pass over the plates and during the intermediate shifting of the web. The ink is supplied from the fountains to the ductor rolls once for each reciprocation of the cross heads and is well distributed before being delivered to the forms. he form rollers not only supply ink to the forms but also travel onto the inking plates and serve to supply. ink thereto and distribute ink thereon. The form rollers 12 and 12 also serve as form rollers to spread the ink over the form both ways of travel and in addition spread ink over the nearest half of both ink plates. and thus supply the ink for the form rollers 15 and 15 and for the distributing rollers above them.

In order to slack the web between the feed and delivery, devices during the time the intermediate part of the web is being drawn forward over the beds bythe action of the loopingv rollers, and the deliveryand to ease the friction of the web against the impression cylinders while they are out of in pression and to restore the desired uniform tension of the web before and while the web is being actually printed upon, the guide roller 7 is shown as mounted on arms or levers 7 (one of which is pivoted as at T en each cross head) One lever '2 carries a roller Y adapted to engage a cam bar 7* attached to the underside of the bed 1 or other convenient part of the machine frame. The ends of this bar 7* are tapered as shown so that the roller T may easily engage and disengage said cam bar during the reciprocation of the cross heads. Just before the cylinders impinge the web against the type form the roller 7 will engage one end of the cam bar and rock the lever 7 so as to slightly raisethe roller T just before the impression and thus properly tension the web before and during the time the web is being printed. When the cylinders clear the form after an impression, the roller 7 clears the opposite end of the cam bar and thus permits the roller 7 to slightly drop and slack the web between the infeed and the delivery roller I very slight movement. of the roller 7 would sullice to properly slack and tension the web; a movement of about of an inch of the roller 7 would suffice for this purpose.

Operation.

feed rollers feed 20 inches of web which is taken up by the looping roller 6 and the dewhich is supplied by the looping roller 6 operated by the cam 9 in proper time. The feed roll feeds 24; inches 01" web while the cylinders are clear of the type terms at each end of the bed, and this 2% inches of web together with the inches of web taken up and supplied by the looping rollers during the taking of impression mak s a total of inches of web fed for each stroke of the cylinder, and this n inches of web is shifted between the looping rollers 6, 6 and between the bedsand cylinders during the time that the cylinders are out oi contact with the forms at each end of the bees. This shitting movement of i l inches oi web is effected by the combined acivery roller 8 delivers a like amount of web,

tion of the delivery roll 8 and upper looping.

roller 6*. The feed and delivery rolls operate continuously, and the intcrmedate portion of the web is alternately held stationary during the taking of impression by the action of the looping roller 6 during; which time the amount of the web required by the continuously operating delivery roll 8 is supplied from the looping roll 6*; 88 inches of web is fed into and delivered from the press with each revolution oi the crank wheels ete reciprocation of the cross heads. This enables me to produce twice as many peri'ected papers for each reciprocation of the cross heads as is produced by the old style single cylinder cross reads. By the increased rotary action in the intermittent movement of the web 24; inches oi web is transferred while the press is off impression by the action of the delivery roll 8; and 20 inches of web is transferred from the looping roller 6 to the looping roller 6 by the action of the looping roller 6 while the cross head or cylinder is traveling 48 inches and back (total 96 inches). This enables me to print 88 inches of web including margins for each reciprocation or the cylinder which is almost equal to a rotary press product and I thus gain one complete perfected paper with an increase of only 10 inches of travel. In other words where one paper would require 38 inches of travel, by increasing the travel 10 inches (48 inches) 1 gain an additional paper.

The inieed and outt'eed devices are properly rotated in the right direction and 1 per time by being; geared directly to the main drive crank wheels, which for example are 56 inches on pitch line. The gears on the infeed and outteed rolls are lei inches, and such in and out feed rollers are 7 inches in diameter. Thus for each revolution of the main crank wheels or reciprocation or" the cylinders 88 inches of web is fed through the press from the feed to the delivery, equaling tour 253 inch severed sheets.

in this construction I have eliminated a large number 0:? gears, shafts and studs heretofore used in flat bed web presses. l have also eliminated two inlr fountains; and such fountains are at the end of the press where they are readily accessible and can be tilled and set while the press is in opera tion.

l'Vhat I claim is:

1. In a flat bed web printing press the combinationa bed adapted to carry a printing sur'face;-a pair ot'cylindersc0- operating with said bed; means for reciprocating the cylinders over the bed; web feeding and delivering mechanism; means tor directing the web from the :leedingr mechanism successively between the cylinders and bed to the delivery; means for loopingr the web between the cylinders so that two impressions are made on the web from the same form by the cylinders on each s 'irclre such impression lF-ri a," on. dii'l'ereut portions of the same web; means for stopping the forward movement of the portion of the web being: printed just prior to and durine the printing 0perati0n; and means for shitting; forward the printed portion of the web a distance equal in length to two impressions on the web plus margins while the cylinders are clear of the forms at each end of the bed.

2. in printing press set forth in claim cylinders for me bet impression cylinders for press as set forth in tween bl claim 1 means for tensioning the intermediate portion between the feed and delivery just before and during the printing operation, and for slacking such intermediate portion of the web after the printing operation and while such portion of the web is being shifted orward.

l. in a printing press as set forth in claim l; a looping; roller traveling with the cylinders; rocking levers carrying said roller a cam adapted to engage the lever and move the roller so as to tension the intermediate portion of the web during the printingoperation, the cam permitting the roller to move and slaclr this portion of the web after the printing operation.

5. in a flat bed web printing press as set forth in claim 1; an inking; plate at each end of the l d and form rollers at both sides of and itermediate the cylinders adapted to coop to with the said plates and ink the torn-s substantially as described.

6. in. a flat bed web printing press a pair of beds adapted to carry printing forms or surfaces; a pair oi cylinders (OOPQlRtlDg with one bed a second pair of cylinders cooperatinp with the other bed; means for reciprocatii sa'l cylinders; web feeding r r and delivering mechanism; means for d1.-

recting the web from the teedh mechanism successively between the pairs of cylinders and beds to be printed so that two impressions made by each pair of cylinders from the form on the related bed at each stroke of the cylinders; for looping the web between the cylinders in each pair so that the two impressions produced I b such cylinder from the term on the related bed will be on different portions of the same web; tor stopping the forward lenient or the portions oi the web being o *nted just prior to and durinp; the printoperation; and means for shifting tor- 'd the printed portions the web a disonce equal in length to two impressions on web plus inar ins while the cylinders are elearot the tor; ateach end of the bed.

' it bed web printing press, having cylnders cooperating with means r reciprocating said web feeding and delivering reans for directing the web a feeding; inef'ha sin successively be- 1 cyliinlors anti means for etc ping the :V'orward movement '1 the portion of the web being; printed just prior to and during the printin operation; and means tor s 'ti. tor-wor the printed portions of the web while the cylinders are clear ot the forms with means to tension portion of the erinediate the beds operation and slack er the printing inechan J1. we -t-l 3.10.111 1.4L

6 means for tensioning the portion of the web between the feed and delivery just before and d iring the printing operation and for slacking; the intermediate portion of the web after the printing operation and while,

such portion or the web is being forward. 7

9. in a flat bed press as set forth in claim 6; a looping roller traveling; with the cylinders; rocking lever mrrying; said roller and cam means adapted. to more the roller so as to tension the intermediate portion of the web during the printing operation, and slack this portion of the web the printing operation.

10. In a flat bed web printing press the combination of two type beds, a pair of cylinders operating on one bed; a of cylinders operating on the other bed; cross heads in which said cylinders are jonrnaled'; mean for reciprocatino; the cross heads to lTlOVS the cylinders be and I beds that two im ons made by each pair oi cyli ders troin the forms on the related bed at each svrohe of the cylinders; a web feeding mechanisin' a livery mechanism; means for dire J from the feeding mechanism suctessively be tween one bed and its pair of relatedc rl' ders and then bet veen the other bed and its pair of relat d cylinders 9 -.d then to the delivery means for looping the web oe ween the cylinders in each pair so that the two in'ipressions produced by such cylinder-5 from the term on the related bed will be on diil'erent portions of the sar sweb; devices for looping the web between the feeding: niechanisin and the first cylinder and'bctween the delivery mechanism and the lamb cylinder whereby the intermediate portion of the web is stopped during the taking ot' impressions and then shifted forward be tween the beds and cylinders after the taking; oi impressions; and means co-actinq with the looping devices whereby a len :h of web equal to two impressions plus margins is shifted between the feeding and deliverinp; mechanismswhile the cylinders are clear of the terms at each end of the beds.

11. In ,a printing press set forth in claim 10 means for tensioningthe portion out the web between the feed and delivery justbeifore and during the printing operation and means for slacl such portion oi the web after the printing o while such portion of the web is being shifted forward.

12. In a printing press as set forth in claim 10 said web looping mechanism comprising an oscillating lever carrying looping rollers on its upper and lower ends, a cam geared directly to the cranl: gears and a bell crank lever having one arm engaging said cam. and a lint: connecting the other arm of said crank lever to said looping lever shifted eration and to oscillate the latter, substantially as de- C sciioed.

rinting operaoi the web 1sberoller to nors set forth in cling with the ingsaid roller,

levers to move nriiting press the e bets arranged in of cylinders operatof linders operatieads in which s, crank gears a' these cross 3 h is ia and forth ously operating web iously operatineclmnisin, means for dioin the feeding; mechanism of cylinders 'y; means for en the cylinders in irnpessions profrom the form on different porb, and two impressions be of cylinders from the fled bed at each stroke of for looping the web end the first the web is or inpressions i 4 1 1 .oetween the bees I and delivering i t e cylinders are clear 0t itch end of the beds. as set forth in liieans tor tinsioning the portion of the web letween the feed and delivery just before and during the printing operation, and means for slacking such portion the web after the printing operation and while such portion of the Web is beingshifted forward.

17. In a web printing press as set forth in. HA iJL (ism) in claim 15, the web looping mechanism comprising an oscillating lever carrying looping rollers on its upper and lower ends, a. cam geared directly to the crank gears and bell crank lever having one arzn engaging said earn and a link connecting; the other arm of said crank lever to said looping lever to oscillate the latter, substantially as described.

18. in a printing prc s set forth in claim impression cylinders over which the web is looped and means for 'ng said roller so as to slack the intermet late portion of the web alter the printino' operation and while such portion o the w being shifted and return said roller to normal position to properly tension 1e int portion oi the web prior to and curing L printing operation.

19. ln a prin press set cla'm 15, s loopii'ig roller interin. i c inders in one pair, rocking levers carrysaid roller, a cam adapted to cause the he intermediate portion oi the web during; the printingoperation and permit the roller to move and slack this portion of the web atter the printing operation.

20. in flat bed printing; press the combination of a bed and s recigrocs i o; cylinder cooperating with the bed, a cranh ear and connections for operating the cylinder, a web feeding roll, a web delivery roll, and d' 'oct gearing between the feed roll and crenk and a on the delivery roll meshing with said crank 21. in a. web printing presshie combination oi a pair of beds, a pair of cylinders co-acting with the beds, a web feeding roll, a web delivery roll, means 101' guiding the web from the feeding roll to the ro crank gears and connections for redelivery ciorocating; the cylinders, a on the feeding roll directly L eshing with the crank gear, and a. gear on the delivery roll directly meshing with the crank gear.

22. in a web print tion of 21 pair of beds, a co-actinp; with the beds, a web deliverg roll, means webs from the feeding devices livery devices, web looping com for operating said devices gears and connections for r cylinders; a gear on the we) to directly meshing with the cranli peer; I gear on the delivery roll dire tly ieshing with the crank gear, and direc gearing between the crank gear shaft and the cam for operating the looping rollers.

In testimony that l claim the foregoing as my own, I affix my signature.

v n n Lei).

ecinro a web guide roller with the 

